From Alexander Wang's H&M sports collection to Beyonce's athletic line for Topshop launching this Fall, wearing your gym gear out and about shows no signs of bowing out. From track pants to sweatshirts and sports bras, the trick to acing this trend is in the choice of materials. Opt for sports attire in hi-tech fabrics such as neoprene, mesh and racing stripes. If you're still not convinced, start off slow with clever accessorising of your wardrobe staples. Think baseball caps, football socks and, our favourite, trainers.